[3] Knight began transporting general commodities from Phoenix, Arizona, to Los Angeles, California.

They have grown from a few associates to more than 4,000, and from a family-owned business to a publicly held company trading on the New York Stock Exchange (KNX) in 1994.

In 2019, Knight-Swift settled a $100 million class-action lawsuit alleging the company failed to classify 20,000 owner-operator drivers as employees.

[8] In July 2024, Knight-Swift acquired Dependable Highway Express, Inc., a LTL carrier out of Los Angeles.

[11] In 2022, Knight-Swift announced plans for using autonomous vehicles in its trucking lines, through a partnership with Embark Technology.